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SWF Technology Center

The SWF file format delivers vector graphics, text, video, and sound over the Internet and is supported by Adobe® Flash® Player and Adobe AIR™ software. Flash Player already reaches over 98% of Internet-enabled desktops and more than half a billion handsets and mobile devices.

The SWF file format is designed to be an efficient binary delivery format, not a format for exchanging graphics between graphics editors.

SWF File Format Specification (Version 9)

The SWF file format is available as an open specification to create products and technology that implement the specification. SWF 9 introduces the ActionScript™ 3.0 language and virtual machine.

Download the SWF file format specification (PDF, 1.9 MB)

Adobe seriously considers all feedback to the SWF file format specification. E-mail any unclear or potentially erroneous information within the specification to Adobe at flashformat@adobe.com.

Note: All e-mail submissions shall be subject to the Terms of Use.